IEC 60939-2:2005/AMD1:2023

IEC 60939-2 ®
Edition 2.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Passive filter units for electromagnetic interference suppression –
Part 2: Sectional specification – Passive filter units for which safety tests are
appropriate – Test methods and general requirements

Filtres passifs d’antiparasitage –
Partie 2: Spécification intermédiaire – Filtres passifs pour lesquels des essais de
sécurité sont appropriés – Méthodes d’essai et exigences générales
IEC 60939-2:2005-02/AMD1:2023-08(en-fr)

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IEC 60939-2 ®
Edition 2.0 2023-08
INTERNATIONAL
STANDARD
NORME
INTERNATIONALE
AMENDMENT 1
AMENDEMENT 1
Passive filter units for electromagnetic interference suppression –

Part 2: Sectional specification – Passive filter units for which safety tests are

appropriate – Test methods and general requirements

Filtres passifs d’antiparasitage –

Partie 2: Spécification intermédiaire – Filtres passifs pour lesquels des essais

de sécurité sont appropriés – Méthodes d’essai et exigences générales

INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
COMMISSION
ELECTROTECHNIQUE
INTERNATIONALE
ICS 31.160  ISBN 978-2-8322-7360-9

– 2 – IEC 60939-2:2005/AMD1:2023
© IEC 2023
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
PASSIVE FILTER UNITS FOR ELECTROMAGNETIC
INTERFERENCE SUPPRESSION –
Part 2: Sectional specification – Passive filter units for which safety tests
are appropriate – Test methods and general requirements

AMENDMENT 1
FOREWORD
1) The International Electrotechnical Commission (IEC) is a worldwide organization for standardization comprising
all national electrotechnical committees (IEC National Committees). The object of IEC is to promote international
co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and
in addition to other activities, IEC publishes International Standards, Technical Specifications, Technical Reports,
Publicly Available Specifications (PAS) and Guides (hereafter referred to as “IEC Publication(s)”). Their
preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with
may participate in this preparatory work. International, governmental and non-governmental organizations liaising
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Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.
2) The formal decisions or agreements of IEC on technical matters express, as nearly as possible, an international
consensus of opinion on the relevant subjects since each technical committee has representation from all
interested IEC National Committees.
3) IEC Publications have the form of recommendations for international use and are accepted by IEC National
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8) Attention is drawn to the Normative references cited in this publication. Use of the referenced publications is
indispensable for the correct application of this publication.
9) Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. IEC shall not be held responsible for identifying any or all such patent rights.
Amendment 1 to IEC 60939-2:2005 has been prepared by IEC technical committee 40:
Capacitors and resistors for electronic equipment.
The text of this Amendment is based on the following documents:
Draft Report on voting
40/3059/FDIS 40/3072/RVD
Full information on the voting for its approval can be found in the report on voting indicated in
the above table.
The language used for the development of this Amendment is English.

© IEC 2023
This document was drafted in accordance with ISO/IEC Directives, Part 2, and developed in
accordance with ISO/IEC Directives, Part 1 and ISO/IEC Directives, IEC Supplement, available
at www.iec.ch/members_experts/refdocs. The main document types developed by IEC are
described in greater detail at www.iec.ch/publications/.
A list of all parts in the IEC 60939 series, published under the general title Passive filter units
for electromagnetic interference suppression, can be found on the IEC website.
The committee has decided that the contents of this document will remain unchanged until the
stability date indicated on the IEC website under webstore.iec.ch in the data related to the
specific document. At this date, the document will be
• reconfirmed,
• withdrawn,
• replaced by a revised edition, or
• amended.
___________
1.2 Normative references
In this subclause, change the following references to dated references:
IEC 60335-1:2020, Household and similar electrical appliances – Safety – Part 1: General
requirements
IEC 60384-14:2023, Fixed capacitors for use in electronic equipment – Part 14: Sectional
specification – Fixed capacitors for electromagnetic interference suppression and connection
to the supply mains
IEC 60939-1:2010, Passive filter units for electromagnetic interference suppression – Part 1:
Generic specification
Move the following references to Bibliography because they are not referred to normatively:
IEC 60384-9, Fixed capacitors for use in electronic equipment – Part 9: Sectional specification:
Fixed capacitors of ceramic dielectric, Class 2
IEC 60938-1:2021, Fixed inductors for electromagnetic interference suppression – Part 1:
Generic specification
Entry 1.4.3 and Table 2 shall be modified as below to reflect the content of IEC 60384-14:2023:
1.4.3
class Y capacitor
capacitor or RC-unit of a type suitable for use in situations where failure of the capacitor could
lead to danger of electric shock.
Class Y capacitors are further divided into three subclasses, Y1, Y2 and Y4, as shown in
Table 2.
– 4 – IEC 60939-2:2005/AMD1:2023
© IEC 2023
Table 2 – Classification of Class Y capacitors
Subclass Type of insulation bridged Range of rated Peak impulse voltage
voltages
U applied before endurance test
P
Y1 Double insulation or reinforced ≤500 V 8,0 kV
insulation
Basic insulation or ≥150 V
Y2 C ≤ 1,0 µF C > 1,0 µF
N N
supplementary insulation ≤500 V
5 kV 5
U = kV
P
C
N
−6
10 F
Y4 Basic insulation or <150 V 2,5 kV
supplementary insulation
Y2 capacitors may be substituted by Y1 capacitors of the same or higher U
R
NOTE 1 For definitions of basic, supplementary, double, and reinforced insulation, see IEC 61140.
NOTE 2 The factor used for the reduction of U for capacitance values above 1,0 µF maintains 0,5 × C U
P N P
constant for these capacitance values; C is in F.
N
NOTE 3 Overvoltage categories in association with rated impulse voltage and rated mains voltage are found in
IEC 60664-1.
One Y1-capacitor may bridge double insulation or reinforced insulation.
The enclosure of a Y1-capacitor shall not contain other components.
Assemblies, like Delta by-pass or T-connected by-pass capacitors, may be constructed from
Y-capacitors and X-capacitors provided these capacitors fulfil the requirements for the relevant
X and Y subclasses.
One Y-capacitor may bridge basic insulation. One Y-capacitor may bridge supplementary
insulation. If combined basic and supplementary insulations are bridged by two or more Y2- or
Y4-capacitors in series, they shall have the same class and sub-class, the same rated voltage,
and the same nominal capacitance value.

4.1 Earth inductors incorporated in filters
Change the existing text of 4.1 with the following including the new Table 13:
4.1 Earth inductors incorporated in filters
Earth inductors incorporated in filters shall meet the requirements of the relevant
specification(s).
The cross-section of the copper winding shall be not less than the value specified in Table 13.
Additional information can also be found in IEC 60938-1:2021, Annex B.

© IEC 2023
Table 13 – Minimum copper cross-sectional area of ear
...